Is pre-freeze sperm preparation more advantageous than post-freeze?
نویسندگان
چکیده
منابع مشابه
Sperm freeze-drying; effects on sperm parameters
Today, sperm cryopreservation is a routine practice in infertility clinics. One of the alternative methods to preserve sperm is freeze-drying. This process consists of three steps. The first step is sample freezing, during which the solvent is separated from the solvent. Water forms ice crystals and the solute is placed between the ice crystals. Freezing may be done in a separate device or in a...
متن کاملMembrane Differentiations in Freeze-fractured Mammalian Sperm
A correlated thin-sectioning and freeze-fracturing study has been made of guinea pig and rat spermatozoa. In sections, the cell membrane over the acrosome has a concanavalin A and ruthenium red reactive glycocalyx which exhibits an ordered pattern related to the lattice of crystalline domains within the plane of the membrane revealed by freeze-fracturing. The cleaved acrosomal membrane also sho...
متن کاملNon-equilibrated post freeze out distributions
We discuss freeze out on the hypersurface with time-like normal vector, trying to answer how realistic is to assume thermal post freeze out distributions for measured hadrons. Using simple kinetic models for gradual freeze out we are able to generate thermal post FO distribution, but only in highly simplified situation. In a more advanced model, taking into account rescattering and re-thermaliz...
متن کاملTo freeze or not to freeze
Male and female rats respond to a fearful experience in different ways, but this was not previously taken into account in research into psychiatric disorders.
متن کاملACROSOMAL DISRUPTION IN SPERM Freeze-Fracture of Altered Membranes
"Capaci ta t ion" is a physiological event which alters sperm to permit rapid penetration through oocyte investments and fusion between gametes. Acrosomal "reaction," the physiological release of acrosomal contents, occurs after this facilitating process. In this study, acrosomal "disruption" of guinea pig and rat sperm was achieved in vitro by incubating sperm together with the follicular cont...
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ژورنال
عنوان ژورنال: Reproduction and Fertility
سال: 2021
ISSN: 2633-8386
DOI: 10.1530/raf-20-0041